Introducing
Baseline reads your Apple Health data and scores your recovery and energy against your normal, not anyone else's.
View on GitHub How it works
THE DAILY CHECK-IN
Your body is telling you something.
Here’s how to listen.
How ready your body is this morning, from overnight HRV, resting heart rate, sleep, breathing rate, and wrist temperature.
Your energy through the day. It starts at your recovery score, drains with activity and stress, and recharges with rest and sleep.
Illustrative scores. Your numbers will be personal to you.
WHY BASELINE EXISTS
Baseline started with a frustration: Apple Health collected plenty of numbers, but didn’t offer the detailed recovery picture we wanted—especially on older Apple Watches.
We wanted a clearer answer to “How recovered am I?” and “How much energy do I have left?” So we built Baseline to turn existing Apple Health data into personal recovery and energy insights, with every calculation open to explore.
PERSONAL BY NATURE
Thoughtful science. Clear insights. A little more understanding.
Every metric is measured against your own 60-day history. Because your normal is yours alone.
YOU ARE THE REFERENCE POINT7-day rolling HRV averages, a normal zone that ignores day-to-day noise, and HRV from deep sleep, based on published readiness research.
Every formula and weight is shown in the app. No black box. Just a clear view of what goes into your score.
Sleep-stage timeline, efficiency, consistency, sleep debt, and overnight blood oxygen, heart rate, and temperature.
See exactly how much charge each workout cost. Connect the things you do with the way you feel.
All data stays on your iPhone. No servers, no accounts, no tracking. Your health is your business.
ON YOUR PHONE. IN YOUR CONTROL.A NEW DAILY RITUAL
Wear your Apple Watch, especially overnight. Let your body do the talking.
Baseline learns your normal from the last 60 days of Apple Health data.
Open the app each morning for your recovery, and check your Body Charge through the day.
A CLOSER LOOK
A preview of your new daily check-in. Screens shown are illustrative.
OPEN CODE. OPEN BOOK.
Free and open source under the MIT license. Read the code, see exactly how scores are calculated, or build it yourself.
Star on GitHub// No secrets. Just your signals.
let recoveryWeights = [
"HRV": 0.40,
"Sleep": 0.25,
"Resting HR": 0.20,
"Breathing & Temp": 0.15
]Not yet. You can build it from source with Xcode; instructions are on GitHub.
An iPhone with iOS 27 or later, plus a Mac with Xcode to build and install the app from source. An Apple Watch is strongly recommended.
No. Everything is processed on your device and Baseline only reads from Apple Health.
No. Scores are estimates for personal insight only, not medical advice.